1 /******************************************************************************* 2 * Copyright 2011 See AUTHORS file. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 ******************************************************************************/ 16 17 package com.badlogic.gdx.tests; 18 19 import com.badlogic.gdx.ApplicationListener; 20 import com.badlogic.gdx.Gdx; 21 import com.badlogic.gdx.graphics.GL20; 22 import com.badlogic.gdx.graphics.OrthographicCamera; 23 import com.badlogic.gdx.graphics.Texture; 24 import com.badlogic.gdx.graphics.g2d.SpriteBatch; 25 import com.badlogic.gdx.input.GestureDetector; 26 import com.badlogic.gdx.input.GestureDetector.GestureListener; 27 import com.badlogic.gdx.math.Vector2; 28 import com.badlogic.gdx.tests.utils.GdxTest; 29 30 public class GestureDetectorTest extends GdxTest implements ApplicationListener { 31 Texture texture; 32 SpriteBatch batch; 33 OrthographicCamera camera; 34 CameraController controller; 35 GestureDetector gestureDetector; 36 37 class CameraController implements GestureListener { 38 float velX, velY; 39 boolean flinging = false; 40 float initialScale = 1; 41 touchDown(float x, float y, int pointer, int button)42 public boolean touchDown (float x, float y, int pointer, int button) { 43 flinging = false; 44 initialScale = camera.zoom; 45 return false; 46 } 47 48 @Override tap(float x, float y, int count, int button)49 public boolean tap (float x, float y, int count, int button) { 50 Gdx.app.log("GestureDetectorTest", "tap at " + x + ", " + y + ", count: " + count); 51 return false; 52 } 53 54 @Override longPress(float x, float y)55 public boolean longPress (float x, float y) { 56 Gdx.app.log("GestureDetectorTest", "long press at " + x + ", " + y); 57 return false; 58 } 59 60 @Override fling(float velocityX, float velocityY, int button)61 public boolean fling (float velocityX, float velocityY, int button) { 62 Gdx.app.log("GestureDetectorTest", "fling " + velocityX + ", " + velocityY); 63 flinging = true; 64 velX = camera.zoom * velocityX * 0.5f; 65 velY = camera.zoom * velocityY * 0.5f; 66 return false; 67 } 68 69 @Override pan(float x, float y, float deltaX, float deltaY)70 public boolean pan (float x, float y, float deltaX, float deltaY) { 71 // Gdx.app.log("GestureDetectorTest", "pan at " + x + ", " + y); 72 camera.position.add(-deltaX * camera.zoom, deltaY * camera.zoom, 0); 73 return false; 74 } 75 76 @Override panStop(float x, float y, int pointer, int button)77 public boolean panStop (float x, float y, int pointer, int button) { 78 Gdx.app.log("GestureDetectorTest", "pan stop at " + x + ", " + y); 79 return false; 80 } 81 82 @Override zoom(float originalDistance, float currentDistance)83 public boolean zoom (float originalDistance, float currentDistance) { 84 float ratio = originalDistance / currentDistance; 85 camera.zoom = initialScale * ratio; 86 System.out.println(camera.zoom); 87 return false; 88 } 89 90 @Override pinch(Vector2 initialFirstPointer, Vector2 initialSecondPointer, Vector2 firstPointer, Vector2 secondPointer)91 public boolean pinch (Vector2 initialFirstPointer, Vector2 initialSecondPointer, Vector2 firstPointer, Vector2 secondPointer) { 92 return false; 93 } 94 update()95 public void update () { 96 if (flinging) { 97 velX *= 0.98f; 98 velY *= 0.98f; 99 camera.position.add(-velX * Gdx.graphics.getDeltaTime(), velY * Gdx.graphics.getDeltaTime(), 0); 100 if (Math.abs(velX) < 0.01f) velX = 0; 101 if (Math.abs(velY) < 0.01f) velY = 0; 102 } 103 } 104 105 @Override pinchStop()106 public void pinchStop () { 107 } 108 } 109 110 @Override create()111 public void create () { 112 texture = new Texture("data/stones.jpg"); 113 batch = new SpriteBatch(); 114 camera = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight()); 115 controller = new CameraController(); 116 gestureDetector = new GestureDetector(20, 0.5f, 2, 0.15f, controller); 117 Gdx.input.setInputProcessor(gestureDetector); 118 } 119 120 @Override render()121 public void render () { 122 Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); 123 controller.update(); 124 camera.update(); 125 batch.setProjectionMatrix(camera.combined); 126 batch.begin(); 127 batch.draw(texture, 0, 0, texture.getWidth() * 2, texture.getHeight() * 2); 128 batch.end(); 129 } 130 131 @Override dispose()132 public void dispose () { 133 texture.dispose(); 134 batch.dispose(); 135 } 136 } 137
